Improved lifting-jack



UNITED STATES PATENT OIIEICE0 JOEL LOOKE, OF BRIDGEPORT, NEW JERSEY.

IMPROVED LIFTING-JACK.

Specification forming part of Letters Patent No. 5I,734, dated December26, 1865.

To all whom it may concern Be it known that I, JOEL LOCKE, ofBridgeport, in the county otl Gloucester and Stare of New Jersey, haveinvented a new and Improved Lifting-Jack; Iand I do hereby declare thatthe following is a full, clear, and exact description thereof', whichwill enable others skilled in the art to make and use the same,reference beinghad to the accompanying` drawings, forming part ot' thisspecitcation, in which- Figure lis a side elevation of myjack, showingits application to a carriagenxle. Fig. 2 is a front elevation of thesame.

Similar letters of reference indicate like parts.

The object of my invention is to produce a very simple and cheapcarriage or lifting-jack,

l one that can be quickly operated.

My invention consists in the employment ot two upright standards or legshaving the lifting-lever pivoted to or between them, and in thearrangement ot a pawl, in connection with teeth or stops on thelifting-lever, for locking` or retaining' the littinglever at anydesired point.

AB represent the legs ofthejack, the former, A, being somewhat longerthan the latter'. Between these legs, at the proper distance from theground, is pivoted the lifting-lever U. This lifting-lever is merely astrip ot' timber ofthe proper length, Src., having a series` of teeth, aa, cnt upon its upper surface, into which rests one end ot' a pawl, 1),which is hinged to the longer leg A, as shown clearly in the drawings.

In operating the jack the legs A B are drawn near enough together tocnuse the end d ot' the lever- C, when depressed, to rest just under theaxle of the vehicle. Then the wheel is raised by depressing the handleot' the lifting-lever O,'and the lever is retained in such position bycausing the pawl D to rest against the proper one ot1 the teeth a a.

The drawings so clearly represent the invention that a furtherdescription will not be nf-cessary. Snfticeit to say that a verychenp,simple, and easilyoperated lifting-jack is produced by this invention.

I claim as new and desire to secure by Letters Patent- A lifting-jackconsisting of two legs, A B,.

lifting-lever (J, and pawl D, combined and arranged substantially asshown and described.

JOEL LOCKE.

Witnesses:

CHARLES P. SHIVERS, JOHN S. SMITH.

